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<h1 class="title">Qt Quick Demo - StocQt</h1>
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  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2017 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
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  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
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  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
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  import QtQuick 2.0

  <span class="type"><a href="../qtqmlmodels/qml-qtqml-models-listmodel.html">ListModel</a></span> {
      <span class="name">id</span>: <span class="name">model</span>
      property <span class="type"><a href="../qtqml/qml-string.html">string</a></span> <span class="name">stockId</span>: <span class="string">&quot;&quot;</span>
      property <span class="type"><a href="../qtqml/qml-string.html">string</a></span> <span class="name">stockName</span>: <span class="string">&quot;&quot;</span>
      property <span class="type"><a href="../qtqml/qml-var.html">var</a></span> <span class="name">newest</span>
      property <span class="type"><a href="../qtqml/qml-var.html">var</a></span> <span class="name">oldest</span>
      property <span class="type"><a href="../qtqml/qml-bool.html">bool</a></span> <span class="name">ready</span>: <span class="number">false</span>
      property <span class="type"><a href="../qtqml/qml-real.html">real</a></span> <span class="name">stockPrice</span>: <span class="number">0.0</span>
      property <span class="type"><a href="../qtqml/qml-real.html">real</a></span> <span class="name">stockPriceChanged</span>: <span class="number">0.0</span>

      signal <span class="type">dataReady</span>

      <span class="keyword">function</span> <span class="name">indexOf</span>(date) {
          <span class="keyword">if</span> (<span class="name">model</span>.<span class="name">count</span> <span class="operator">==</span> <span class="number">0</span>)
              <span class="keyword">return</span> -<span class="number">1</span>;

          <span class="keyword">if</span> (<span class="name">newest</span> <span class="operator">&lt;=</span> <span class="name">date</span>)
              <span class="name">date</span> <span class="operator">=</span> new <span class="name">Date</span>(<span class="name">newest</span>.<span class="name">getYear</span>(),
                              <span class="name">newest</span>.<span class="name">getMonth</span>(),
                              <span class="name">newest</span>.<span class="name">getDate</span>() <span class="operator">-</span> <span class="number">7</span>);

          <span class="keyword">if</span> (<span class="name">oldest</span> <span class="operator">&gt;=</span> <span class="name">date</span>)
              <span class="keyword">return</span> <span class="name">model</span>.<span class="name">count</span> <span class="operator">-</span> <span class="number">1</span>;

          var currDiff = <span class="number">0</span>;
          var bestDiff = <span class="name">Math</span>.<span class="name">abs</span>(<span class="name">date</span>.<span class="name">getTime</span>() <span class="operator">-</span> <span class="name">newest</span>.<span class="name">getTime</span>());
          var retval = <span class="number">0</span>;
          <span class="keyword">for</span> (var i = 0; <span class="name">i</span> <span class="operator">&lt;</span> <span class="name">model</span>.<span class="name">count</span>; i++) {
              var d = new <span class="name">Date</span>(<span class="name">model</span>.<span class="name">get</span>(<span class="name">i</span>).<span class="name">date</span>);
              <span class="name">currDiff</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">abs</span>(<span class="name">d</span>.<span class="name">getTime</span>() <span class="operator">-</span> <span class="name">date</span>.<span class="name">getTime</span>());
              <span class="keyword">if</span> (<span class="name">currDiff</span> <span class="operator">&lt;</span> <span class="name">bestDiff</span>) {
                  <span class="name">bestDiff</span> <span class="operator">=</span> <span class="name">currDiff</span>;
                  <span class="name">retval</span> <span class="operator">=</span> <span class="name">i</span> <span class="operator">+</span> <span class="number">1</span>;
              }
              <span class="keyword">if</span> (<span class="name">currDiff</span> <span class="operator">&gt;</span> <span class="name">bestDiff</span>)
                  <span class="keyword">return</span> <span class="name">retval</span>;
          }
          <span class="keyword">return</span> -<span class="number">1</span>;
      }

      <span class="keyword">function</span> <span class="name">createStockPrice</span>(r) {
          <span class="keyword">return</span> {
                  &quot;date&quot;: <span class="name">r</span>[<span class="number">0</span>],
                  &quot;open&quot;:<span class="name">r</span>[<span class="number">1</span>],
                  &quot;high&quot;:<span class="name">r</span>[<span class="number">2</span>],
                  &quot;low&quot;:<span class="name">r</span>[<span class="number">3</span>],
                  &quot;close&quot;:<span class="name">r</span>[<span class="number">4</span>],
                  &quot;volume&quot;:<span class="name">r</span>[<span class="number">5</span>],
                 };
      }

      <span class="keyword">function</span> <span class="name">updateStock</span>() {
          <span class="keyword">if</span> (<span class="name">stockId</span> <span class="operator">===</span> <span class="string">&quot;&quot;</span>)
              <span class="keyword">return</span>;

          var startDate = new <span class="name">Date</span>(<span class="number">2011</span>, <span class="number">4</span>, <span class="number">25</span>);
          var endDate = new <span class="name">Date</span>(); <span class="comment">//today</span>

          var req = <span class="string">&quot;data/&quot;</span> <span class="operator">+</span> <span class="name">stockId</span> <span class="operator">+</span> <span class="string">&quot;.csv&quot;</span>
          <span class="keyword">if</span> (!<span class="name">req</span>)
              <span class="keyword">return</span>;

          var xhr = new <span class="name">XMLHttpRequest</span>;

          <span class="name">xhr</span>.<span class="name">open</span>(<span class="string">&quot;GET&quot;</span>, <span class="name">req</span>, <span class="number">true</span>);

          <span class="name">model</span>.<span class="name">ready</span> <span class="operator">=</span> <span class="number">false</span>;
          <span class="name">model</span>.<span class="name">clear</span>();
          var i = <span class="number">1</span>; <span class="comment">//skip the first line</span>
          <span class="name">xhr</span>.<span class="name">onreadystatechange</span> <span class="operator">=</span> <span class="keyword">function</span>() {
              <span class="keyword">if</span> (<span class="name">xhr</span>.<span class="name">readyState</span> <span class="operator">===</span> <span class="name">XMLHttpRequest</span>.<span class="name">LOADING</span> <span class="operator">||</span> <span class="name">xhr</span>.<span class="name">readyState</span> <span class="operator">===</span> <span class="name">XMLHttpRequest</span>.<span class="name">DONE</span>) {
                  var records = <span class="name">xhr</span>.<span class="name">responseText</span>.<span class="name">split</span>(<span class="string">'\n'</span>);
                  <span class="keyword">for</span> (;<span class="name">i</span> <span class="operator">&lt;</span> <span class="name">records</span>.<span class="name">length</span>; i++ ) {
                      var r = <span class="name">records</span>[<span class="name">i</span>].<span class="name">split</span>(<span class="string">','</span>);
                      <span class="keyword">if</span> (<span class="name">r</span>.<span class="name">length</span> <span class="operator">&gt;=</span> <span class="number">6</span>)
                          <span class="name">model</span>.<span class="name">append</span>(<span class="name">createStockPrice</span>(<span class="name">r</span>));
                  }

                  <span class="keyword">if</span> (<span class="name">xhr</span>.<span class="name">readyState</span> <span class="operator">===</span> <span class="name">XMLHttpRequest</span>.<span class="name">DONE</span>) {
                      <span class="keyword">if</span> (<span class="name">model</span>.<span class="name">count</span> <span class="operator">&gt;</span> <span class="number">0</span>) {
                          <span class="name">model</span>.<span class="name">ready</span> <span class="operator">=</span> <span class="number">true</span>;
                          <span class="name">model</span>.<span class="name">stockPrice</span> <span class="operator">=</span> <span class="name">model</span>.<span class="name">get</span>(<span class="number">0</span>).<span class="name">close</span>;
                          <span class="name">model</span>.<span class="name">stockPriceChanged</span> <span class="operator">=</span> <span class="name">model</span>.<span class="name">count</span> <span class="operator">&gt;</span> <span class="number">1</span> ? (<span class="name">Math</span>.<span class="name">round</span>((<span class="name">model</span>.<span class="name">stockPrice</span> <span class="operator">-</span> <span class="name">model</span>.<span class="name">get</span>(<span class="number">1</span>).<span class="name">close</span>) <span class="operator">*</span> <span class="number">100</span>) <span class="operator">/</span> <span class="number">100</span>) : <span class="number">0</span>;
                          <span class="name">newest</span> <span class="operator">=</span> new <span class="name">Date</span>(<span class="name">model</span>.<span class="name">get</span>(<span class="number">0</span>).<span class="name">date</span>);
                          <span class="name">oldest</span> <span class="operator">=</span> new <span class="name">Date</span>(<span class="name">model</span>.<span class="name">get</span>(<span class="name">model</span>.<span class="name">count</span> <span class="operator">-</span> <span class="number">1</span>).<span class="name">date</span>);
                      } <span class="keyword">else</span> {
                          <span class="name">model</span>.<span class="name">stockPrice</span> <span class="operator">=</span> <span class="number">0</span>;
                          <span class="name">model</span>.<span class="name">stockPriceChanged</span> <span class="operator">=</span> <span class="number">0</span>;
                      }
                      <span class="name">model</span>.<span class="name">dataReady</span>(); <span class="comment">// emit signal - model.ready indicates whether the data is valid</span>
                  }
              }
          }
          <span class="name">xhr</span>.<span class="name">send</span>()
      }
  }

</pre>
